Tack the Paper
securely, at the top and bottom, to the drawing-board, spread your colored chalks out on the table, and group the colors so that they will be handy, and when you want any color you will waste no time seeking that particular lump of chalk (Fig. 219).
Keep a Sharp Knife
handy, on the table, so that as soon as the audience has seen one picture you can run the point of the knife along the bottom of the paper, just above the tacks, free the lower edge of the drawing, throw it up and over the top of the easel, without taking time to detach it at the top. You are then ready to begin upon a new drawing.
Figs. 235-239.
The Drawings Themselves
must be simple, but with practice some very effective designs can be made with a few rapid strokes, which at a distance will look like finished paintings. You may
Begin Your Talk
by drawing a vertical line AB (Fig. 220). As soon as this is done you must step aside, so that all the audience may see what you have drawn, and while they are looking at the line tell them that you are going to give them a talk upon the character of lines, and what the lines represent.